As far as developing 70mm C41, I believe that you can run it through many noritsu film processors. I'm not sure about running 100ft. of film through all those rollers though.. My boss said he would let me run 6ft or so through. No customers have brought us any 70mm film to process.. As long as the film cartridge fits inside the film holder bay with the lid closed it should work.
Any other ideas for processing 70mm black and white?